Home / 711,401.09-981,726.36-389,117.48

Finding the Fourth Proportional to 711,401.09, 981,726.36 and 389,117.48

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Solution

The fourth proportional to 711,401.09, 981,726.36 and 389,117.48 is: 536,978.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,401.09 : 981,726.36 = 389,117.48 : x
  2. Step 2: Convert to fraction form
    711,401.09/981,726.36 = 389,117.48/x
  3. Step 3: Cross multiply
    711,401.09x = 981,726.36 × 389,117.48
  4. Step 4: Simplify right side
    711,401.09x = 382,006,887,252.77
  5. Step 5: Solve for x
    x = 382,006,887,252.77/711,401.09
  6. Step 6: Final answer
    x = 536,978.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.